JP3499635B2 - Strip tension control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is to uniformly control the winding tension of each reel holders in the winding device of the web winding the strip through the respective Lee <br/> holder was installed provided on the rotary shaft The present invention relates to a winding tension control device.

[0002]

2. Description of the Related Art Conventionally, as a winding device of this type, a device applied to a slitter device for obtaining a plurality of products (strips) of a predetermined width from a wide material roll in the production of magnetic tapes or films. is there. The slitter device cuts a wide raw material unwound from the unwinding shaft into a predetermined width with a cutter, and winds a plurality of cut strips to manufacture a strip-shaped roll (pancake). A winding device in which a large number of reel holders are arranged in a row on one common rotating shaft is used for the winding portion of the band-shaped material.

In the conventional winding device, it is necessary to adjust the torque of the reel holder so that the tension of the wound strip does not vary due to the uneven film pressure on the original side. Therefore, in the reel holder of the conventional winding device, the one using the permanent magnet (eddy current roll or the like) is used. This reel holder will be described with reference to FIG .

In the figure, the conventional reel holder 1 is
A holder main body 4 which is attached to the rotary shaft 2 via a bearing 3 and is free to rotate with respect to the rotary shaft 2, and a rotary plate 5 made of a magnetic material which is fixed to the rotary shaft 2 and rotates integrally with the rotary shaft. A permanent magnet 6 is provided on the side surface of the main body 4 on the rotary plate 5 side, and a ring-shaped reel (not shown) is fitted around the outer periphery of the holder main body 4 to wind the strip-shaped material on the reel. A coil spring 7 is fitted around the outside of the holder body 4, and when the reel is fitted around the outside of the holder body 4, the coil spring 7 is inserted.
Position the reel and prevent it from coming off.

In such a reel holder 1, when the rotary plate 5 rotates integrally with the rotary shaft 2, the attraction force between the rotary plate 5 and the permanent magnet 6 transmits the rotation of the rotary shaft 2 to the holder body 4 side. The holder body 4 also rotates with a slip amount (rotational phase difference) corresponding to the tension of the band-shaped material, and the band-shaped material is wound on the reel. When the tension of the wound strip changes, the change in the slip between the rotary plate 5 and the holder body 4 absorbs the change in tension and the tension of the strip is adjusted to a predetermined value. ing.

[0006]

However, in the conventional reel holder using the permanent magnet, the tension is determined to some extent by the characteristics of the permanent magnet, and it is difficult to adjust the tension of the strip. Further, when the reel holders are lined up on one common rotating shaft to wind up the strip-shaped material, the torque transmitted to the reel holder body 4 side depends on the characteristics of the permanent magnets 6, and therefore the torque of the permanent magnets 6 is reduced. Due to the characteristic variations, the tension of the wound strip is not necessarily uniform in all reel holders, and the quality of the pancakes produced may not be constant.

[0007] The present invention has been made in view of the above problems, strip capable of torque of the reel holder to take advantage individually adjustable winding apparatus to uniformly control the tension of each strip and to provide a winding tension control device.

[0008]

Means for Solving the Problems] Therefore, in this invention, times
A structure that transmits the rotation of the rotating shaft by using the electromagnetic attraction force of an electromagnet
Multiple reel holders are installed on the rotary shaft, and each reel
Belt holder by rotating the holder in synchronization with the rotation axis
Each reel holder using a winding device configured to wind
Winding of a band-shaped material that controls the winding tension of the ribbon substantially uniformly
It is a tension control device that is wound around each reel holder.
Multiple tension detecting the hand which detect the tension of the strip that
Detects the winding diameter of the step and the strip of each reel holder
Multiple winding diameter detection means and detection of each winding diameter detection means
Set the target value of tension variable according to the winding diameter based on the value
Target value setting means and the winding tension of each reel holder
Each reel holder to match the target value set above.
Each reel holder is controlled by variably controlling the energization amount of the electromagnet of the
And a torque control means for controlling the generated torque of the
The torque control means, as shown in FIG.
Rotating axis control means for controlling the rolling speed and energization of the electromagnet
And an electromagnet control means for controlling the quantity,
Reel holder with variable rotation speed control based on target value
The torque generated by the
Energizing amount of electromagnet for each reel holder based on the detected value
To adjust each tension to match the target value.
The torque generated by the ruder is finely adjusted individually.

Further, the reel holder winds a strip-shaped material.
Take the ring-shaped reel that fits and holds it around the outside
Holder body that is rotatably supported by the rotating shaft via bearings
And use the electromagnetic attraction of the electromagnet to rotate the holder body.
And a rotation transmission unit that transmits the rotation of the rolling shaft,
Good. Further, the rotation transmitting unit includes a rotary plate fixed to the rotary shaft and rotating integrally with the rotary shaft, and a plurality of electromagnets arranged on one side surface of the rotary plate at substantially equal intervals along the circumferential direction. the provided, aspects of arranging the electromagnet of the rotary plate, have good when a configuration close to the side surface of the holder body.

[0010]

With the winding tension control device for a belt-like member having such a structure, a winding device provided with a reel holder using an electromagnet is used, and the tension detecting means detects the tension of each belt-like member wound around each reel holder. At the same time, the winding diameter of each strip of the reel holder is detected by the winding diameter detecting means.
Then, the target value setting means variably sets the target value of the tension in accordance with the winding diameter based on the detection value of each winding diameter detecting means, and the torque control means sets the winding tension of each reel holder to the aforementioned value. Rotation of the rotation axis to match the target value
Roughly adjust the torque generated by the reel holder by variably controlling the speed
And adjust each reel holder based on the value detected by each tension detector.
The amount of electricity supplied to the electromagnet of each dipper is controlled to finely adjust each tension, and the torque generated by each winding jig is controlled.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. The configuration of an embodiment of the winding device applied to the winding tension control device of the present invention will be described with reference to FIGS. 2 and 3 . In the drawing, in the winding device 11, a large number of reel holders 13, which are the features of the present invention, are arranged in a row on one common rotating shaft 12. Each reel holder 13 is rotatably supported by a rotating shaft 12 via a bearing 14, and a strip-shaped material 21 such as a magnetic tape is provided around the outer periphery thereof.
A holder main body 15 that fits and holds a reel 22 that winds up (indicated by a dotted line in the figure), and a rotary plate 16 that is fixed to the rotary shaft 12 facing the side surface of the holder main body 15 with a gap therebetween, A plurality of electromagnets 17 each having a coil wound around a core made of a magnetic material are arranged on the plate 16 at substantially equal intervals in the circumferential direction as shown in FIG . A magnetic body 18 is provided on the side surface of the holder body 15 facing the electromagnet 17. The holder body 15
A coil spring 19 for positioning and retaining the reel 22 is provided on the outer periphery of the same as in the conventional case.

The electric wire 20 of the electromagnet 17 is a hollow rotating shaft 12
Wired through the inside of. As a method of energizing the energizing wire 20, for example, a ring-shaped brush is provided at the end of the rotating shaft 12 in correspondence with the number of winding jigs, and each winding jig is connected to a power feeding device via each brush. You can just pass it. Here, the rotation transmitting unit is configured to include the rotating plate 16 and the electromagnet 17.

Next, the operation will be described. The winding operation of the strip 21 by the reel holder 13 according to the present embodiment is the same as the conventional one. When the rotary shaft 12 rotates, the rotary plate 16 rotates integrally with the rotary shaft 12, and when the rotary plate 16 rotates, the electromagnet 17 rotates. The holder body 15 also rotates due to the attraction force of the magnetic force of the reel 22
The strip 21 is wound on the top.

Here, for example, when the generated torque characteristics of the reel holders 13 at the same energization amount vary as shown in FIG. 4 , by individually controlling the energization amount of the electromagnets 17 of the reel holders 13, it can be controlled to a predetermined torque range shown by oblique lines in FIG. 4. Therefore, according to the winding device including the reel holder 13, the generated torque of the reel holder 13 can be adjusted individually to make the generated torque uniform even if there are variations in the parts of the reel holder 13. next, even when arrayed a number of reel holder 13 in the one rotational shaft 12, it is possible to wind the strip 21 at a uniform tension, it is possible to make the quality of the pancakes constant ones.

Next, an embodiment of the winding tension control device of the present invention will be described. FIG. 5 is a schematic view of a slitter device for a magnetic tape to which the winding tension control device of the present invention using the winding device described above is applied. The same parts as those in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. In the figure,
The wide original 32 set on the unwinding shaft 31
Guide roll is unwound by the rotation of the motor
33 to 35, dancer roll 36, and cutter unit 37. The cutter unit 37 includes an upper blade 37a that is rotationally driven by a motor and a lower blade 37b that is pressed against the upper blade 37a.
It is provided at intervals corresponding to the width of the product and cuts the raw fabric 32 into a plurality of widths.

The strip 21 having a plurality of widths (which is a magnetic tape in this embodiment) after being cut by the cutter unit 37 reaches the touch roll 40 through the guide rolls 38 and 39, respectively, and thereafter is driven to rotate by the motor. It is wound around each reel holder 13 arranged in a large number on the rotating shaft 12. A tension pickup 41, for example, is provided as a tension detecting means for detecting the tension of the strip 21 immediately before being wound up on the reel holder 13 on the strip conveying path before reaching the touch roll 40. Further, for example, a potentiometer-type diameter measuring sensor 42 is provided as a winding diameter detecting means for detecting the winding diameter of the strip 21 for each reel holder 13.

The control unit 43 has a built-in microcomputer and sets a target value of the tension of the belt-like material as shown in the flowchart of FIG. 6 based on the detection signals from the tension pickups 41 and the diameter measuring sensor 42 . Then, the rotation speed of the rotating shaft 12 and the energization amount of the electromagnet 17 of the reel holder 13 are controlled so that the winding tension of each strip 21 matches the target value.

Therefore, the control unit 43 has the functions of the target value setting means and the torque control means. Figure
The tension control operation of this embodiment will be described with reference to 6 flowchart of. In step 1 (indicated by S1 in the drawing, the same applies hereinafter), the winding diameter of the strip 21 wound by each reel holder 13 is read from each diameter measuring sensor 42.

In step 2, the average value of the detected values of the winding diameter of each read reel holder 13 is calculated.
Then, for example, the target value of the tension corresponding to the calculated value is searched from the map in which the relationship between the winding diameter and the tension is set in advance, and the current target value is set. When winding a strip, it is general to make the outer winding tension weaker than the inner winding tension. This is because, when the winding tension is equal between the inner side and the outer side or is strong on the outer side, dropout (magnetic defect) is likely to occur in a magnetic tape due to cinching (winding tightness), and the quality of the product is deteriorated. Therefore, it is necessary to properly adjust the tension according to the winding diameter, and in step 2, the target value is set according to the winding diameter.

In step 3, the rotation speed of the rotary shaft 12 is adjusted according to the target value set in step 2 to roughly adjust the torque of each reel holder 13. The relationship between the torque of the reel holder 13 and the rotation speed of the rotary shaft 12 is as shown by the solid line in FIG. 7 as the rotation speed increases.
The increasing torque of the rotating shaft 12 decreases as the winding diameter increases.
The winding tension of is controlled to be weak. The adjustment of the torque based on the rotation speed uniformly adjusts the torque of each reel holder 13.

In step 4, the tension immediately before the winding of the strip 21 for each reel holder 13 is read from each tension pickup 41. In step 5 , each reel holder 13
The detected value of tension for each tension is compared with the target value, and each reel holder is processed in step 5 until each detected value matches the target value.
The energization amount of the electromagnets 17 of 13 is increased / decreased and adjusted, and the torque is finely adjusted for each reel holder 13. Step 5
The adjustment operation of is to individually adjust the torque of each reel holder 13, and by this adjustment, the torque of all reel holders 13 is properly adjusted and the tension of each strip 21 wound on each reel holder 13 is adjusted. Control evenly.

According to such a winding tension control device, after roughly adjusting the torque of the reel holder 13 at the rotational speed of the rotary shaft 12, the amount of electricity supplied to the electromagnet is adjusted for each reel holder 13 to adjust the reel holder. Since the torque of 13 is finely adjusted and uniformly controlled, even if there are variations in the parts of the reel holder 13, this can be absorbed and the tension of each strip 21 can be adjusted uniformly. Therefore, the quality of the band-shaped pancake can be made uniform. Also, in this embodiment, the amount of torque adjustment by the electromagnet 17 is small,
Power consumption by the electromagnet 17 is Ru can be reduced.

[0023] In the present embodiment, has been described winding apparatus of a magnetic tape, it is applicable to all if winding takes device swath.

[0024]

According to the present invention as described above, according to the present invention, times
Adjust the rotation speed of the rolling shaft to adjust the torque of each reel holder.
After making a rough adjustment, energize the electromagnet for each reel holder.
Adjust the amount and fine tune the torque of each reel holder.
As a result, when multiple reel holders are provided on one rotating shaft and multiple strips are wound at the same time, the variations in the characteristics of the reel holders can be eliminated and the tension of each strip can be made uniform. , The quality of the band-shaped pancake can be made uniform. Also, the amount of torque adjustment by the electromagnet
Power consumption by the electromagnet can be reduced
There are advantages.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a winding tension control device of the present invention.

FIG. 2 is a configuration diagram showing an embodiment of a winding device of the present invention.

FIG. 3 is a view showing an electromagnet of the reel holder according to the embodiment .
Diagram showing example layout

FIG. 4 is a view for explaining the operation of the above embodiment.

FIG. 5 is suitable for the first embodiment of the winding tension control device of the present invention .
Schematic diagram of the magnetic tape slitting device used for

FIG. 6 is a flow chart for explaining the operation of the first embodiment.
To

FIG. 7 shows the relationship between the rotating shaft and the torque of the reel holder.
Figure

FIG. 8 is a configuration diagram of a conventional reel holder.

[Explanation of symbols]

11 Winding device 12 rotation axis 13 reel holder 14 Bearing 15 Holder body 16 rotating plate 17 Electromagnet 18 magnetic material 21 strips 22 reel 41 Tension pickup 42 Diameter measurement sensor 43 Control unit

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-3-95056 (JP, A) JP-A-3-288752 (JP, A) JP-A-5-4767 (JP, A) JP-A-6- 16338 (JP, A) JP-A-4-308145 (JP, A) JP-A-6-239506 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65H 18/10 B65H 23 / 195 B65H 23/032

Claims (3)

(57) [Claims] 1. An electromagnetic attraction force of an electromagnet is used to rotate a rotary shaft.
A plurality of reel holders configured to transmit the
Line up and rotate each reel holder in synchronization with the rotation axis.
A winding tension controller for controlling the winding tension of each reel holder by using a winding device configured to roll and wind the ribbon. A plurality of tension detecting means for detecting the tension of each strip wound on the reel, a plurality of winding diameter detecting means for detecting the winding diameter of the strip of each reel holder, and a detection value of each winding diameter detecting means Target value setting means for variably setting the target value of tension according to the winding diameter based on
The winding tension of the reel holder and a torque control unit for controlling the generated torque of the variable control to the reel holders energization of the electromagnets of each reel holder so as to match the target value the set, the torque The control means controls the rotation speed of the rotating shaft.
Rolling axis control means and an electromagnet for controlling the amount of electricity supplied to the electromagnet
A control means is provided, and rotation is performed based on the set target value.
The rotation speed is variably controlled to roughen the torque generated by the reel holder.
Adjust and adjust each value based on the detection value of each tension detecting means.
Each tension is controlled by controlling the energization amount of the electromagnet for each reel holder.
Torque generated by each reel holder to match the target value
Bands characterized by finely adjusting each
Winding tension control device. 2. The reel holder winds up a band-shaped material.
The ring-shaped reel is fitted and held on the outer periphery and is attached to the rotary shaft.
The holder body, which is rotatably supported by bearings, and the electric
Using the electromagnetic attractive force of a magnet,
A rotation transmission unit that transmits rotation is provided.
A winding tension control device for the belt-like article according to. 3. The rotation transmitting portion includes a rotary plate fixed to the rotary shaft and rotating integrally with the rotary shaft, and a plurality of the rotary plates arranged on one side surface of the rotary plate at substantially equal intervals along the circumferential direction. 3. The electromagnet according to claim 2 , wherein the side surface of the rotating plate on which the electromagnet is arranged is close to the side surface of the holder body .
Winding tension control device for strips.